Support jpeg Exif.Image.Orientation tag

[ryandesign]

Aseprite doesn't appear to support the Exif.Image.Orientation tag. I took a photo of an object with my iPhone in order to import it into Aseprite as a reference layer. When opening the photo in Apple's Preview app, it shows right-side up, but in Aseprite, it's upside-down. In Preview, the Info window shows "Orientation: 3 (Rotated 180°)". Or from the command line:

$ exifprint IMG_7288.JPG | grep Orientation
Exif.Image.Orientation                       0x0112 Short       1  3

(exifprint is part of exiv2.)

I suspect the Orientation depends on which way I had rotated the phone when I took the photo.

Aseprite and System version

• Aseprite version: 1.2.25 compiled from source
• System: macOS High Sierra 10.13.6

[dacap]

Hi @ryandesign, yeah, it's a known issue 😢

For references layer this is a must. For regular images (File > Open) I'm still not sure if the tag should be read and rotated in the decoding process on-the-fly, but after that, if the image is saved the tag is lost and the image data is saved in with the new/correct rotation.